You are buying one set of strings

10’s Elixir Nanoweb E11002 80/20 Bronze Acoustic Guitar Strings 10-47 Extra Ligh
11’s Elixir Nanoweb E11027 80/20 Bronze Acoustic Guitar Strings 11-52 Custom Light
12’s Elixir Nanoweb E11052 80/20 Bronze Acoustic Guitar Strings 12-53 Light
13’s Elixir Nanoweb E11102 80/20 Bronze Acoustic Guitar Strings 13-56 Medium

Elixir Strings, the #1 acoustic guitar string*
Only coated string brand to protect the entire string with an ultra-thin coating, keeping gunk out of the gaps between the windings
Extended Tone Life – players report their tone lasts longer than any other string, uncoated or coated
Consistent performance and tone – ready to play whenever you are
Smooth feel that is easy on your fingers and enhances playability
Reduced finger squeak – good for both performance and recording
Anti-Rust Plated Plain Steel Strings resist tone-deadening corrosion, ensuring a longer life for the entire set
With less hassle and expense of frequent string changes, spend more time making music